EP0809930B1 - Rotobaler - Google Patents

Description

The invention relates to a round baler in the preamble of the claim 1 specified Art.

In GP 2.30 and GP 2.50 round balers from the company Deutz-Fahr, Cologne, DE (described in the brochure "Service Training" network binding GP 2.30 / GP 2.50 from Deutz-Fahr, p. E41 to E55) the actuator has the The task of engaging the feed roller, keeping it engaged and uncoupling, but also to bring the mains isolator into the starting position or to stretch. Since considerable power is required for tensioning, a expensive, heavy and voluminous actuator required. The movement of the locking device from the locked position to the release position becomes dependent on the feeding length of the network through a complex and multi-part mechanism controlled, the rotary movement of the feed roller via a crank mechanism mechanically tapped and a measuring segment determining the feed length of the network contains. The feed length is set manually by adjusting a tipping point of the measuring segment.

In a well-known RP 200 round baler from Welger, the net separator is used clamped by means of a hydraulic cylinder. The feed roller is over a electromagnetic clutch is driven until the entrained by the bale Net takes the feed roller. The adjustment of the locking device the locked position in the release position is through a complex mechanism controlled with a swiveling measuring segment, which by the rotary movement the feed roller is adjusted. The mechanism is complex, multi-part and takes up a relatively large amount of installation space. The feed length is set manually by adjusting the tipping point of the measuring segment.

From EP-A-0 293 025 a round baler is known in which the actuator a cutting knife between one for engaging and disengaging the feed roller Passive position and a cutting position to and fro. In the passive position of the cutting knife passes through the network unaffected. In the cutting position of the cutting knife, the tensile stress built up is used in the network, to disconnect the network. The actuator executes a single actuating stroke over which a tension pulley either reaches the coupling position or the release position. With the respective movement of the actuator into the release position, a Handlebar twisted an element that takes the cutting blade with it.

Further prior art relating to net binding devices is contained in: US-A-5 433 059, EP-A-0 225 398, US-A-5 129 208, US-A-5 109 652 and US-A-5 216 873.

The invention has for its object a round baler of the beginning mentioned type with a structurally and above all control-technically simple, functionally reliable and easy to use net binding device.

The stated object is achieved with the features of patent claim 1.

According to the invention, the actuator is used for this, not just the coupling and uncoupling to control the feed roller, but also the adjustment of the locking device trigger from the locked position to the release position as soon as it has performed a predetermined adjustment stroke in which at least the feed roller has been engaged.

With the constructive departure from the known made by claim 2 Principles, either the actuator for tensioning the mains isolator and that Use to unhitch and unhitch the feed roller and control the To perform locking device by means of a complex mechanism, or for the three functions: clamping, coupling and uncoupling, limit feed length, separate Using facilities becomes a simple construction with few Individual parts, small installation space, high functional reliability and above all one achieved simple, precise and convenient controllability. Since the actuator of the Is removed from the task of tensioning the mains isolator, a small, use a lighter and less expensive actuator, which is characterized by high control precision and moderate energy consumption. With simple control the actuator, the locking device can be operated precisely. The control technology The conveniently adjustable feeding length of the net is exactly maintained.

In order to apply the relatively large clamping force for the mains disconnector, according to claim 3 a return device, preferably a hydraulic cylinder, is provided which - there it is only required for this function - it is simple, powerful and robust.

According to claim 4, the actuator can lock the device directly, i.e. through direct positive engagement on the locking device, or actuate indirectly, i.e. expediently via a for coupling and uncoupling the feed roller anyway adjustable component of the binding device.

According to claim 5, an independent device is used to the separation device trigger so that it breaks through the net under its spring tension. This device is activated by the actuating stroke of the actuator, with to which the feed roller is coupled. From this point on, the subtracted network length measured before reaching a predetermined subtracted Network length the device triggers the disconnecting device.

In the embodiment according to claim 6, the stroke of the actuator is expedient of a commercially available linear motor unit, in one direction for coupling and uncoupling the feed roller, and in the other direction to actuate the locking device and thus to limit the feed length used. The two different functions listed by the actuator do not interfere with each other. A complex additional mechanism that the Moves the feed roller mechanically, limits the feed length and actuated the locking device, is omitted.

According to claim 7 is structurally simple and reliable, the lever for the second function of actuating the locking device is used with what the number of individual parts is reduced.

According to claim 8, valuable space is saved in the vertical direction. The control curve attacks with a cheap lever arm on the pawl, preferably with one Loosen the pawl favoring angles so that the actuator is not a large one It takes force and the trigger point is exactly reproducible.

According to claim 9, the pawl can be accommodated easily and in a space-saving manner. It is brought into the locked position by the spring, and to the correct one Pressed into the release position by the control cam of the control lever.

According to claim 10, the return is opposed by the pin-slot coupling decouples the sudden movement of the knife lever.

According to claim 11, good ease of use and increased operational reliability reached. On the control device can be the timer Set the time period over which the feed roller with the e.g. from a press roll derived rotary motion is driven and the net end so far introduces that the net is safely carried by the bale is. Then the actuator disengages the feed roller, the one with the removed one Network continues. The measuring device determines on the basis of the rotation signals of the feed roller the current feed length and controls the actuator or the locking device as soon as the set feed length is reached around the locking device to solve and disconnect the network. All functions of the binding device can be set and initiated centrally on the control device, either directly on the round baler or in the towing vehicle of the round baler. Additional signal transmitters can be connected to the control device be e.g. reaching the one that represents the completion of the bale Bale pressure or an initial opening stroke of the discharge flap under the Bale reaction pressure, the standstill of the round baler, the ejection of the integrated round bales, reports on the state of the supply and Storage system, and the like.

Fig. 1

eine schematische Seitenansicht, einer Rundballenpresse mit einer Netz-Bindevorrichtung,

Fig. 2

einen Vertikalschnitt der Bindevorrichtung, als Durchsicht,

Fig.3-5

zugehörige Ansichten eines Details,

Fig. 6

eine vergrößerte Seitenansicht kooperierender Komponenten, und

Fig. 7

ein Blockdiagramm mit Komponenten der Bindevorrichtung, die an eine Steuervorrichtung angeschlossen sind, wobei eine wietere Ausführungsform angedeutet ist.

An embodiment of the subject matter of the invention is explained with reference to the drawings. Show it:

Fig. 1

1 shows a schematic side view of a round baler with a net binding device,

Fig. 2

a vertical section of the binding device, as a view,

Fig. 3-5

associated views of a detail,

Fig. 6

an enlarged side view of cooperating components, and

Fig. 7

a block diagram with components of the binding device, which are connected to a control device, wherein a further embodiment is indicated.

A round baler RP according to FIG. 1 has a mobile housing 1 with one opening discharge flap 2 and a pick-up device 3 for receiving the Crop crops that are limited in a at least by press rollers 4 in the housing Bale chamber P is wound into a round bale and compacted in the process. The finished one Round bales are integrated into a binding net (net N) and ejected. To the Linking the round bale into the binding net N is a net binding device B. the round baler RP is provided (possibly together with a twine tying device; Not shown). The binding device B is in the area of a feed gap, not shown, to the press chamber P and is schematic in FIG. 1 indicated with a role 5 of the network N.

The net N coming from the roll 5 is shown in FIG. 2 by a drivable feed roller W, on which a spring-loaded via a lever 14 and a spring 15 Counter roller 6 rests on the, preferably structured, circumference of the press roller 4 brought, which is driven counterclockwise and the fed network N puts on the round bales, not shown, touching the press rollers 4, so this takes the network N with it during its rotational movement and integrates itself automatically. Then a predetermined feed length of the binding network N is unwound before using a network separator (impact knife 8, stationary anvil 7) the network N separated becomes. The striking knife 8 is seated on curved knife levers 9 on a knife lever shaft 10 are pivotally mounted and, e.g. via a knee joint mechanism 11 and a tension spring 12, from the tensioned standby position shown abruptly pivoted as soon as a locking device K, the Knife lever 9 holds in the ready position shown, in the release position brought.

The feed roller W is rotatable on an axis of rotation 13. It is for the initial Feeding the binding network N to drive in the direction of conveyance, namely by means of a belt R which is driven by the upper press roll 4 in FIG. 2. The belt R is between a slip position in which the feed roller W is not is driven, and a dome position (indicated by dashed lines) adjustable in the he drives the feed roller W. To adjust the belt R is a tension pulley S mounted on an actuating lever 21 which is pivotable about a stationary axis 22. To pivot the actuating lever 21 is an actuator M, preferably a linear motor unit provided that has an extendable and retractable plunger 24 which is articulated at 23 on the actuating lever 21. The actuator M is pivotable at 25 at one Support plate 29 of the binding device B mounted on the other components are supported. The actuator M is at 26 for control and power supply connected to a cable.

The locking device K for holding the knife lever 9 in the cocked (Dashed) position has at least one pawl designed as a flat lever 27, which can be pivoted up and down about an axis 28 and by a spring 37 is applied clockwise. The pawl 27 is located behind the Support plate 29, while the adjusting lever 21 is arranged in front of the support plate 29. On hook-like free end 31 of the pawl 27 engages in the ready position Knife lever 9 behind a nose arranged on at least one knife lever 9 36 and extends further through a cutout 30 of the support plate 29 into the range of motion a trigger element 32 of the actuating lever 21 to the front of the Support plate 29. Through a movement of the actuating lever that can be carried out via the actuator M. 21 clockwise, the pawl 27 from the illustrated locking position, in which it engages behind the nose 36 in a counterclockwise direction below pivoted release position releasing the nose 36, namely by means of the release element 32 of the actuating lever 21.

To bring the tension pulley S into the coupling position, in which the belt R in the dashed, tensioned position is brought and the feed roller W takes the lever 21 by means of the actuator M counterclockwise from the shown Position swiveled. This pivoting has no influence on the position or movement of the pawl 27 because this in the embodiment shown only by an additional swivel movement controlled by the actuator M. the actuating lever 21 is acted on from the position shown in a clockwise direction.

On at least one knife lever or on the knife shaft bearing the knife lever 9 10 is a sector-shaped actuator 16 rotatably attached, one for Knife shaft 10 contains concentric arc slot 17, in which a driver pin 18 engages a return device 19, expediently a hydraulic cylinder which e.g. at 20 in the support plate 29 is pivotally mounted.

3, 4 and 5 (Fig. 4 is a view in the direction of arrow IV; Fig. 5th is a view in the direction of arrow V, each in Fig. 3), the lever 21 is a Angle lever with two lever parts 21a and 21b, which are connected to each other at about 90 ° are. 4, a bearing bush 33 is attached to the lever part 21a. In approximately in the area of the bend of the angle lever, the tensioning roller S is rotatably mounted. The other lever part 21b is bent and with an approximately U-shaped according to FIG. 5 Side lever 34 formed in one piece, its approximately parallel to the lever part 21 b lying, bent end 35 as a release element for the pawl one here carries concave pawl cam 32. The control curve 32 is located between the axis of the tension roller S and the articulation point 23 of the actuator M am Lever part 21b. The adjusting lever 21 is e.g. a bent part made of strip material.

Fig. 6 illustrates the cooperation between the actuating lever 21 and the pawl 27. The actuator M is driven on the control side so that it normally assumes a zero position 23 ° (Fig. 6), and from the zero position 23 ° to a dome position 23 'or in an end position 23 ". When the actuator is moving M from the zero position 23 ° into the coupling position 23 'tensions the tensioning roller S. the belt R to drive the feed roller W. In the zero position it is 23 ° Feed roller W uncoupled. The pawl 27 is in the locked position, in which she reaches behind the nose 36. When the actuator M moves from the zero position The pawl 27 is 23 ° into the end position 23 "by means of the control cam 32 moved from the locked position into a release position (not shown), in which it from the nose 36 slides, and the movement of the knife lever 9 to separate the Network. In the end position 23 ", the actuator M can also be on the control side be calibrated to exactly the predetermined positions during the next operation to find. As soon as the knife levers 9 are pivoted (clockwise in FIG. 2), the actuator M moves the articulation point 23 to the zero position 23 °, so that the Pawl 27 is released and when later tensioning the knife lever 9 under the Force of the spring 37 jumps behind the nose 36.

7 schematically illustrates a control device C for the binding device B. The control device C is electronic and preferably with a microprocessor MP trained. Advantageously, W are rotary position sensors on the feed roller 38 provided, which are scanned by means of a resolver 39, the signals representing the extent of the rotary movement of the feed roller W a line 47 to a feed length measuring device 42 in the control device C. transmitted. An adjusting element 43 is used to adjust the feed length. Further is in the control device C, a timer circuit 40 is provided, which is controlled by an adjusting element 41 is adjustable and determines the time during which the tensioning roller S the belt R tensions. This time is expediently chosen so that the free End of the network N reliably forcibly fed by the bale becomes. A switch 44 is also provided, e.g. on the control device C or at a suitable point on the RP round baler and / or in the towing vehicle. Further Signal lines 45 can signal the representative of the completion of the round bale Bale pressure, an opening stroke of the discharge flaps, stopping the round baler RP for a binding process and proper functionality deliver the binding device B to the control device C and / or other important information. The actuator M is via lines 46 to the control device C connected. The adjusting members 41 and 43 can either on the Control device C, the round baler RP or in the associated towing vehicle be provided.

When completing a round bale in the baling chamber P, what by reaching and sensing a representative bale reaction pressure or opening stroke the discharge flap can be found, the free end of the net is located N approximately in the position shown in FIG. 2 on the press roller 4. The knife levers 9 are excited and held by the pawl 27 in the locked position. The Tensioner roller S leaves belt R relaxed. The feed roller W does not rotate. The actuator M is in the zero position 23 °. The return device 19 is extended, so that the bolt 18 is approximately in the position shown. By pressing of the switch 44, a binding process is initiated. The actuator M moves the articulation point 23 from the zero position 23 ° into the coupling position 23 '. The Tensioning roller S tensions the belt R. The feed roller W conveys the network N to Press roll 4 so that it enters the press chamber P with it. The inclusion of the Rotary movement of the feed roller W can be registered via the resolver 39. The actuator M holds the tensioning roller S via the one set in the timer 4 Time in the coupling position 23 'until it is certain that the network N is working properly is taken away from the bale. After the set time has elapsed the actuator M is reset to the zero position 23 °. The feed length measuring device 42 begins or has started to measure the feed length based on of the rotation signals of the feed roller W. When the set feed length is reached, or shortly before, then another control signal is applied by the control device C. transmits the actuator M, the 23 ° from its zero position towards the end position 23 "is adjusted, and thereby via the adjusting lever 21 and the control cam 32 the pawl 27 moves away from the nose 36 into the release position. As soon as the Nose 36 is released, the spring 12 pulls over the knee joint mechanism 11 the knife lever 9 clockwise against the anvil 7, so that the power disconnector disconnects the network N.

The actuator M is meanwhile from the end position 23 "to the zero position 23 ° returned so that the pawl 27 under the force of the spring 37 to catch the nose 36 is ready. The return device 19 can also be controlled via the control device C. or a control valve assigned to it, so that the return 19 rotates the knife shaft 10 counterclockwise via the actuator 16 and the knife lever 9 pivoted until the spring 12 is stretched until the Pawl 27 falls behind the nose 36. Then the pressure of the return device 19 is released, so that this returns to the position shown in FIG. 2. The binding device B is ready for a new binding process.

The feed length could also be at another, connected with the supplied network N moving element can be tapped. The actuator M could also be used on others Attack way on the pawl 27, and not indirectly through the mediation Setting lever 21. The return device 19 could be in the reverse installation position of the actuator 16 also tension the knife lever 9 by extending it.

In Fig. 7, in an alternative embodiment, one is by the control device C guided device 48 shown that the pawl in the release position adjusted as soon as a predetermined length of the net N around the round bale has been wrapped. The device 48 is activated in that the actuator M has coupled the feed roller W into position 23 'with an adjustment stroke. The subtracted length is then, for example, via the components 38, 39 of the network, and the device 48 finally actuates the pawl 27 as soon as the desired length is reached. The actuator M needs this not to carry out the adjustment stroke to 23 ". However, the activation would also be conceivable the device 48 by the return of the actuator M to the zero position 23 °, and only then start to measure the length of the net, because at this point it is certain that the round bale will automatically move into the Net wrapped. These control variants for network length dimensioning are based on simple electronic components, so that no complex mechanism is required and settings can be easily changed on the control are.

Claims (11)

1. Roll baler (RP), having a housing (1) which includes a bale pressing chamber (P) provided with pressure rollers (4), and having a mesh binding apparatus (B) in the region of an inlet aperture which leads into the pressing chamber (P), the binding apparatus (B) having a feed roller (W) for the mesh (N), said roller being connectable and disconnectable by means of an adjustable drive (M), a spring-tensioned mesh cutter (7, 8) which is displaceable from a withdrawn standby position transversely through the mesh (N) into a cutting position, and a locking apparatus (K) for the mesh cutter (7, 8) and its initial resilient tension, said locking apparatus being displaceable from a locked position into a release position in dependence on the length of the mesh (N) supplied, characterised in that the locking apparatus (K) is displaceable into the release position in dependence on a predetermined displacement travel movement of the adjustable drive (M).
2. Roll baler according to claim 1, characterised in that the locking apparatus (K) is displaceable into the release position by means of the adjustable drive (M).
3. Roll baler according to claim 1, characterised in that a return mechanism (19), preferably a hydraulic cylinder, which is separated from the adjustable drive (M), is provided for the impact blade (8) of the mesh blade.
4. Roll baler according to claim 1, characterised in that the adjustable drive (M) can be brought into a movement-transmitting connection with the locking apparatus (K) directly or indirectly.
5. Roll baler according to at least one of claims 1 to 3, characterised in that an apparatus (48), which is actuatable with the displacement travel movement of the adjustment apparatus (M) to connect the feed roller (W), is provided to displace the locking apparatus into the release position in dependence on a predetermined mesh length wound onto the baled roll.
6. Roll baler according to at least one of claims 1 to 4, characterised in that the adjustable drive (M) is a linear motor unit which is displaceable between a zero position (23°), i.e. disconnection of the feed roller (W), a coupled position (23'), i.e. connection of the feed roller, and at least one final position (23") and can be brought into a movement-transmitting adjustable connection via the path of displacement from the zero position (23°) to the final position (23") by means of the locking apparatus (K).
7. Roll baler according to claim 1, characterised in that the locking apparatus (K) has a displaceably mounted locking pawl (27), which locks a blade lever (9) of the tensioned mesh cutter in the locked position, in that the adjustable drive (M) is connected to a pivotably mounted control lever (21), which carries a tensioning roller (S), and in that the control lever (21) has a release member (32, 34, 35) for the locking pawl (27).
8. Roll baler according to claim 7, characterised in that the control lever (21) is an angle lever with a belt tensioning roller (S) mounted in its angle, in that the release member has a U-shaped lateral lever (34) in the region of the angle and on the side of the angle lever (21) remote from the tensioning roller (S), and in that the lateral lever (34) carries a locking pawl cam (32) on its end (35) facing the location (23) where the angle lever (21) is connected to the adjustable drive (M).
9. Roll baler according to claims 7 and 8, characterised in that the locking pawl (27) is a pivotably mounted flat lever with a hook-shaped free end (31), which engages behind a projection (36) on the blade lever (9) in the locked position and engages in the path of movement of the cam (32) with the control lever (21), and in that the locking pawl (27) is loaded by a spring (37) in the pivotal direction to achieve the locked position.
10. Roll baler according to at least one of claims 3 to 9, characterised in that the hydraulic cylinder, which forms the return mechanism (19), is pivotally mounted on an adjustable member (16), which is mounted on the blade lever (9) or on a blade lever shaft (10) carrying the blade lever (9), and in that the pivotal mounting region has a pin-and-slot coupling (17, 18) with a clearance corresponding at least to the working stroke of the blade lever (9).
11. Roll baler according to at least one of claims 3 to 10, characterised in that an electronic control apparatus (C) is provided, which is linked to the adjustable drive (M), possibly to the return mechanism (19), to a rotation indicator (39, 38) of the feed roller (W), and to a starting switch (44), and preferably includes a microprocessor (MP), an adjustable timing circuit (40) being provided in said control apparatus to retain the adjustable drive (M) in the coupled position (23'), as well as an apparatus (42) for measuring the mesh lengths supplied being provided to displace the adjustable drive (M) from the zero position (23°) into the final position (23").

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